- Makefile
adopt the port;
pet portlint;
remove comment about 'applying patches' on the post-patch stage;
unmute post-patch.
- files/*
patch src/share/mh/revoke_keys, to use gpg2;
move patch-gpg2 (410 lines), and split it to have separated patches;
regen all patches using makepatch.
Approved by: rene (mentor)
Differential Revision: https://reviews.freebsd.org/D18871